BOOK X. 



479 



A — Crane-post. B — Socket. C — Oak cross-sills. D — Band. E — Roof-beam. 

 F — Frame. G — Lower small cross-beam. H — Upright timber. I — Bars which 

 come from the sides of the crane-post. K— B -.rs which come from the sides of 



THE UPRIGHT TIMBER. L — RUNDLE DRUMS. M — ToOTHED WHEELS. N — ChAIN. 



O — Pulley. P — Beams of the crane-arm. Q — Oblique beams supporting the beams 

 of the crane-arm. R — Rectangular iron plates. S — Trolley. T — Dome of the 

 furnace. V — Ring. X — Three chains. Y — Crank. Z — The crane-post of the 

 other contrivance. AA — Crane-arm. BB — Oblique beam. CC — Ring of the 

 crane-arm. DD — The second ring. EE — Lever-bar. FF — Third ring. 



GG — Hook. HH — Chain of the dome. II — Chain of the lever-bar 



